Modem Ncu Test (4: Modem Ncu); Relay Test - Canon iR1200 Series Service Manual

CHAPTER 2 USING THE MACHINE

3.21.6 MODEM NCU Test (4: MODEM NCU)

Use it to execute a transmission test for MODEM NCU. In a modem test, you can make
sure that the signals from the modem are transmitted normally by listening to the sound of
signals from the speaker.
You can also use it to make sure that the received tonal signal and DTMF signal are cor-
rectly detected by the modem. To end the test, press the Stop key.
Type

Relay test

G3 signal transmission test
DTMF signal reception test
Tonal signal reception test
V.34 G3 signal transmission test
3.21.6.1 Relay Test
Press '1' on the keypad on the Modem NCU Test menu to select relay test mode. Use the
keypad to operate the various relays of the NCU.
The LCD is turned on or off in relation to the transmission of the relay op-
eration signal as is operated on the keypad; for this reason, you cannot use
the LCD to check a fault on a single relay.
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COPYRIGHT © 2002 CANON INC.
Description
Use it to turn on/off a selected relay to execute a switch-over test.
Use it to generate the G3 signal coming from the modem using
the telephone line terminal and the speaker.
Use it to generate the DTMF signal coming from the modem us-
ing the telephone line terminal and the speaker.
Use it to monitor a specific frequency and the DTMF signal re-
ceived from the telephone line terminal by causing them to be
indicated on the LCD (i.e., the presence/absence as detected). The
reception signal is generated by the speaker.
The modem sends V.34 G3 signals from the modular jack and
speaker.
RELAY 1 010000
1-1 : P ON
0 1 0 0 0
Relay CML P S H D R
Keypad 0 1 2 3 4
F02-321-10
2000 2000 2000 2000
1 : relay ON
2 : relay OFF
0
5
CANON iR1200/iR1300 Series REV. 0 AUG. 2002